Solve for V V^2-2V-15=0

Math
V2-2V-15=0
Factor V2-2V-15 using the AC method.
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Consider the form x2+bx+c. Find a pair of integers whose product is c and whose sum is b. In this case, whose product is -15 and whose sum is -2.
-5,3
Write the factored form using these integers.
(V-5)(V+3)=0
(V-5)(V+3)=0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.
V-5=0
V+3=0
Set the first factor equal to 0 and solve.
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Set the first factor equal to 0.
V-5=0
Add 5 to both sides of the equation.
V=5
V=5
Set the next factor equal to 0 and solve.
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Set the next factor equal to 0.
V+3=0
Subtract 3 from both sides of the equation.
V=-3
V=-3
The final solution is all the values that make (V-5)(V+3)=0 true.
V=5,-3
Solve for V V^2-2V-15=0

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